KVM: x86: introduce sched_in to kvm_x86_ops

sched_in preempt notifier is available for x86, allow its use in
specific virtualization technlogies as well.

Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 7d43dc7..575d3fc6 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -7173,6 +7173,7 @@
 
 void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu)
 {
+	kvm_x86_ops->sched_in(vcpu, cpu);
 }
 
 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)